Utilization of wheat bran for producing activated carbon with high specific surface area via NaOH activation using industrial furnace

Zhang, Ying; Song, Xiaolan; Xu, Yue; Shen, Haijing; Kong, Xiaodong; Xu, Hongmei

doi:10.1016/j.jclepro.2018.11.041

Cited by 136 publications

(60 citation statements)

References 59 publications

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“…In recent years, there has been an increasing interest in the production of activated carbon from bio-waste for sustainable development [85][86][87][88][89][90][91][92][93]. Several sources of bio-waste such as animal, mineral, plant, and vegetables etc.…”

Section: Carbon From Bio-wastes As An Excellent Materials For Edlcmentioning

confidence: 99%

“…Several sources of bio-waste such as animal, mineral, plant, and vegetables etc. have been reported in the literature as base materials for activated carbon production for application as an electrode material for electrochemical energy systems [86,[94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109]. Several types of electrodes have been tried and the most common systems today are built on the electrochemical double-layer capacitor that is carbon-based, has an organic electrolyte, and is easy to manufacture.…”

Section: Carbon From Bio-wastes As An Excellent Materials For Edlcmentioning

confidence: 99%

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Supercapacitor Energy Storage Device Using Biowastes: A Sustainable Approach to Green Energy

et al. 2019

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The demand for renewable energy sources worldwide has gained tremendous research attention over the past decades. Technologies such as wind and solar have been widely researched and reported in the literature. However, economical use of these technologies has not been widespread due partly to cost and the inability for service during of-source periods. To make these technologies more competitive, research into energy storage systems has intensified over the last few decades. The idea is to devise an energy storage system that allows for storage of electricity during lean hours at a relatively cheaper value and delivery later. Energy storage and delivery technologies such as supercapacitors can store and deliver energy at a very fast rate, offering high current in a short duration. The past decade has witnessed a rapid growth in research and development in supercapacitor technology. Several electrochemical properties of the electrode material and electrolyte have been reported in the literature. Supercapacitor electrode materials such as carbon and carbon-based materials have received increasing attention because of their high specific surface area, good electrical conductivity and excellent stability in harsh environments etc. In recent years, there has been an increasing interest in biomass-derived activated carbons as an electrode material for supercapacitor applications. The development of an alternative supercapacitor electrode material from biowaste serves two main purposes: (1) It helps with waste disposal; converting waste to a useful product, and (2) it provides an economic argument for the substantiality of supercapacitor technology. This article reviews recent developments in carbon and carbon-based materials derived from biowaste for supercapacitor technology. A comparison between the various storage mechanisms and electrochemical performance of electrodes derived from biowaste is presented.Sustainability 2019, 11, 414 2 of 22 renewable energy sources such as solar energy, geothermal energy, wind energy, biofuels, etc., while electrochemical energy storage devices such as supercapacitors, rechargeable batteries, etc. have also attracted significant research [9][10][11]. It is not an overstatement to say that successful development of any renewable energy source (e.g., windmills and solar cells), hybrid and electric vehicles and smart grids depend significantly upon the availability of a suitable energy storage system. A considerable amount of literature has been published on the use of supercapacitors as a viable storage device for renewable energy. Over 20,000 articles, books etc. were published in 2017, a higher number of research work is projected for 2018 (data from google scholar). There has been a geometric increase in the research published since the year 2000. Since supercapacitors were first experimented in 1957 by engineers at General Electric, they have found commercial applications in portable electronics, transportation and aerospace industry [12,13]. These applications of supercapacitors ...

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Section: Carbon From Bio-wastes As An Excellent Materials For Edlcmentioning

confidence: 99%

Section: Carbon From Bio-wastes As An Excellent Materials For Edlcmentioning

confidence: 99%

Supercapacitor Energy Storage Device Using Biowastes: A Sustainable Approach to Green Energy

et al. 2019

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“…For WB in Figure 2a, there were some ovate starch granules on sample surface, with diameter of 10-30 μm. [9] For carbonized sample in Figure 2b, the starch granules were pyrolyzed, leaving many hexagon pits. After activation for WBC-4 in Figure 2c, there were many pores in pots.…”

Section: Surface Morphologymentioning

confidence: 99%

“…[9] A small sharp diffraction peak located at~22°, originating from SiO 2 impurity in ash. [16] Due to pyrolysis of organic matter and reaction of SiO 2 with NaOH during activation, [9,19] the peaks of starch and silica were disappeared in WBC pattern. There were two new peaks at 26 and 44°, corresponding to the (002) and (100) planes of amorphous carbon phase.…”

Section: Physical Properties Of Materialsmentioning

confidence: 99%

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Preparation of Hierarchical Porous Carbon from Wheat Bran for Free‐Standing Electrode of High Areal Capacitance Supercapacitor

et al. 2019

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It is impressive that biomass gives out another option for carbon electrode fabrication in supercapacitors which has low cost and sustainable source. In this work, waste of wheat bran was used to synthesize porous carbon via alkali activation. Under mass ratio of NaOH/precursor as 4, the wheat bran carbon presented hierarchical hexagon pores with prominent surface area of 2562 m 2 g À 1 . Utilizing two symmetrical freestanding electrodes, the as-prepared carbon exhibited gravi-metric capacitance of 294.3 F g À 1 at 0.5 A g À 1 and cyclic life of 94 % for 50,000 cycles at 2 A g À 1 , while commercial carbon showed 269.7 F g À 1 and 75 % stability under the same condition. With large mass loading of 20 mg cm À 2 , the wheat bran carbon revealed superior areal capacitance of 3.08 F cm À 2 , and the value could still maintain as 2.80 F cm À 2 over 10,000 cycles. Consequently, the wheat bran has been found as a promising precursor for advanced carbon electrode.

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Preparation of Porous Carbons Using NaOH, K₂CO₃, Na₂CO₃ and Na₂S₂O₃ Activating Agents and Their Supercapacitor Application: A Comparative Study

Demir

Doguscu

2022

ChemistrySelect

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The sustainable energy development of green carbon precursors and inexpensive activating agents has gained great attention with respect to the manufacture of high-performance electrode materials for supercapacitors. Though the most investigated activation agents such as ZnCl 2 and KOH provide porous carbon possessing the high surface area and large charge storage capacity, those activation agents suffer from the use of high dosage utilization and poor carbon production yield. Herein, we report an alternative preparation method for porous carbons using NaOH, K 2 CO 3 , Na 2 CO 3 and Na 2 S 2 O 3 as activating agents, respectively. Activating performances of four pore-forming agents were compared in terms of textural, morphological and electrochemical performance. It was found that the NaOH-activated electrode material (C-NaOH) exhibited a high specific capacitance of 199 F g À 1 at a current density of 0.5 A g À 1 thanks to its large surface area along with large pore volume. In the two-electrode system, the symmetric SC assembled by C-NaOH electrodes delivered an energy density of 4.7 Wh/kg at a power density of 127 W/kg and maintained 3.9 Wh/kg at a power density of 1560 W/kg. Another outcome of this study was that the Na 2 S 2 O 3 -assisted activating agent could introduce heteroatom into the carbon framework, which contributes to pseudocapacitance behavior of electrodes. Overall, the alternative activating strategy could provide a highperformance carbon electrode and may offer a pathway for an advanced energy storage technology.

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Utilization of wheat bran for producing activated carbon with high specific surface area via NaOH activation using industrial furnace

Cited by 136 publications

References 59 publications

Supercapacitor Energy Storage Device Using Biowastes: A Sustainable Approach to Green Energy

Supercapacitor Energy Storage Device Using Biowastes: A Sustainable Approach to Green Energy

Preparation of Hierarchical Porous Carbon from Wheat Bran for Free‐Standing Electrode of High Areal Capacitance Supercapacitor

Preparation of Porous Carbons Using NaOH, K₂CO₃, Na₂CO₃ and Na₂S₂O₃ Activating Agents and Their Supercapacitor Application: A Comparative Study

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Utilization of wheat bran for producing activated carbon with high specific surface area via NaOH activation using industrial furnace

Cited by 136 publications

References 59 publications

Supercapacitor Energy Storage Device Using Biowastes: A Sustainable Approach to Green Energy

Supercapacitor Energy Storage Device Using Biowastes: A Sustainable Approach to Green Energy

Preparation of Hierarchical Porous Carbon from Wheat Bran for Free‐Standing Electrode of High Areal Capacitance Supercapacitor

Preparation of Porous Carbons Using NaOH, K2CO3, Na2CO3 and Na2S2O3 Activating Agents and Their Supercapacitor Application: A Comparative Study

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Preparation of Porous Carbons Using NaOH, K₂CO₃, Na₂CO₃ and Na₂S₂O₃ Activating Agents and Their Supercapacitor Application: A Comparative Study